Unofficial Spondoolies SP20 thread

[therusso81]

PROBLEM TEMP

http://i62.tinypic.com/dpfqj7.png  http://i59.tinypic.com/65s4yq.jpg


POWER SUPPLY 1300 WATT CONECT 220 VOLT

[philipma1957]

Voltage Limit =  0.665     Si


Voltage Limit = 0.710       No

PROBLEM TEMP

 


POWER SUPPLY 1300 WATT CONECT 220 VOLT

[hc977]

Hello people,as i only found this thread usefull about spondoolies sp20 and all related to it,i may ask a little help from this nice community digging in same hole...
Well i have several sp20 miners,some moded with different fans to reduce noise and cool better,they run at about 1350ghs prox each,i do manual volt settings accordingly to temperature as fans are not auto they run on full speed,they served me well couple of months now,but today after i restarted one of them after tweaking voltage,yellow and green lights didnt light up at all,so after alot of differenet tries to recover it with switching power cords,restarting,sd card rebooting,and so on,i concluded that my controller board on top of the miner has probably gone.So i replaced this board with other from different miner,lights are up and miner starts normally,so my question is can this controller be repaired or i shouldnt bother(seems that controller board is getting power as some small leds on the board are up when board examined closely),or i need to replace it,if i do then i would ask any of you if could have spare one so i can buy it,it would be a really great help,as this miner sits now without work ,and you all know how they like to work;)

Thx for any help you provide me...

[tlhIlwI]

...today after i restarted one of them after tweaking voltage,yellow and green lights didnt light up at all,so after alot of differenet tries to recover it with switching power cords,restarting,sd card rebooting,and so on,i concluded that my controller board on top of the miner has probably gone.So i replaced this board with other from different miner,lights are up and miner starts normally,so my question is can this controller be repaired or i shouldnt bother...

This is going to sound crazy, but I have one miner which behaves exactly like this after every power outage (fan spins and Ethernet link lights, but no yellow/green miner LEDs light and it just sits there doing nothing).  I managed to get mine working again with a hair dryer.  Chances are it will not work for you, but it can't hurt to try:

1) You will probably need to use a SD boot card (not recovery)
2) Before powering up the miner heat it up with a hair dryer on the high setting for 60 seconds (blowing it into the air intake is fine)

I've done this with mine three times now and each time it started right up.  Like I said, it can't hurt to try it.

[tarzan2]

...today after i restarted one of them after tweaking voltage,yellow and green lights didnt light up at all,so after alot of differenet tries to recover it with switching power cords,restarting,sd card rebooting,and so on,i concluded that my controller board on top of the miner has probably gone.So i replaced this board with other from different miner,lights are up and miner starts normally,so my question is can this controller be repaired or i shouldnt bother...

This is going to sound crazy, but I have one miner which behaves exactly like this after every power outage (fan spins and Ethernet link lights, but no yellow/green miner LEDs light and it just sits there doing nothing).  I managed to get mine working again with a hair dryer.  Chances are it will not work for you, but it can't hurt to try:

1) You will probably need to use a SD boot card (not recovery)
2) Before powering up the miner heat it up with a hair dryer on the high setting for 60 seconds (blowing it into the air intake is fine)

I've done this with mine three times now and each time it started right up.  Like I said, it can't hurt to try it.

what made you think to try this in the first place?

[tlhIlwI]

what made you think to try this in the first place?

I stumbled onto it by accident.  Mine are usually kept in the garage (no HVAC).  After the failure and when I couldn't get it to boot via SD in the garage I brought it into the house take a closer look at.  It booted perfectly fine in the house over and over again.  As soon as I moved it back to the garage it wouldn't boot.  At first I suspected there was a temperature sensitivity issue (too hot in the garage) so I tested for this failure mode in the house using a hair dryer to make the SP20 hot before starting it.  It still booted in the house even after being heated, so it was not a temperature issue.  That left humidity as the only difference between the environments, so (after a few other things) I tried using the hair dryer to "bake out" any moisture prior to starting it in the garage.  It worked (and reproducibly continues to do so)!  

What I think is going on:

Surface mount ICs, especially BGAs, are moisture sensitive (how much can be found as MSL [moisture sensitivity level] on the datasheet).  Their plastic case can absorb moisture out of the air.  This is normally only an issue during assembly, as any absorbed moisture during part storage can crack/destroy the chip during the reflow process.  To prevent this, chips exposed to moisture are preheated to remove moisture before reflow.

I can't prove it, but I highly suspect that one of the chips on the SP20 controller is extra sensitive to moisture.  As long as the unit is running hot it isn't a problem, but as soon as it is powered down (like in an outage) moisture from a high humidity environment rushes into the chip and it will not restart.  In the worst case, the chip destructs and the controller is permanently dead.  In my case, I was left with a marginal one that will still restart with some hair dryer assistance to remove the moisture.  If my hypothesis is correct then a conformal coating may be a way to prevent the controller from dying in the first place, but some other things would need to be considered before recommending it.

[tarzan2]

huh.. your one smart cookie.. i like cookies

i myself have only recently begun dabbling with circuitry through messing around with arduinos and pis, but i still have ways to go

fiddling with the sp20s i find that just letting them sit sometimes for a few hours, when they dont want to run, will more times than not fix the problem.. i imagine im just waiting for the ambient humidity to change whereas you actively change it

[therusso81]

I have a problem with my sp20 checking suddenly trailed off and I find that the fan is off reviewed disarmed and I find a circuit according to sample photo .. I turn the direct fan on. try to put the sp airing live and not mine .. I guess it's because the target reconoce the fan is not turned on and off. now my question is .. that has repair  http://i57.tinypic.com/2d15jis.jpg   http://i57.tinypic.com/2d15jis.jpg   o donde se puede encontrar esa tarjeta

[-droid-]

I have a problem with my sp20 checking suddenly trailed off and I find that the fan is off reviewed disarmed and I find a circuit according to sample photo .. I turn the direct fan on. try to put the sp airing live and not mine .. I guess it's because the target reconoce the fan is not turned on and off. now my question is .. that has repair  o donde se puede encontrar esa tarjeta

huh?

looks like a voltage regulator was fried, you have to be pretty stellar with soldering to even attempt this fix.. not sure man, bummer

[therusso81]

Yes . USE welding .. What number it is that regular . to buy and replace .

[VirosaGITS]

I did a fan mod for 1 sp20.

I pulled the fan out completely and added a silverstone to the external end of the miner.

Are you sticking with a Pull configuration? Have you tried switching to Push, or Push+Pull?

pull and while it is quiet it is not quite correct. 

 next will be push- pull

Did you ever try this? I can find a follow up to this with the search function.

I would quite like to know how low you can drop the dB with 2 silverstone FHP-141.

[philipma1957]

I did a fan mod for 1 sp20.

I pulled the fan out completely and added a silverstone to the external end of the miner.

Are you sticking with a Pull configuration? Have you tried switching to Push, or Push+Pull?

pull and while it is quiet it is not quite correct. 

 next will be push- pull

Did you ever try this? I can find a follow up to this with the search function.

I would quite like to know how low you can drop the dB with 2 silverstone FHP-141.

GAVE UP ON GETTING SP20'S super quiet.   settled with the stock fans and ran at 6% speed undeclocked

[VirosaGITS]

I did a fan mod for 1 sp20.

I pulled the fan out completely and added a silverstone to the external end of the miner.

Are you sticking with a Pull configuration? Have you tried switching to Push, or Push+Pull?

pull and while it is quiet it is not quite correct. 

 next will be push- pull

Did you ever try this? I can find a follow up to this with the search function.

I would quite like to know how low you can drop the dB with 2 silverstone FHP-141.

GAVE UP ON GETTING SP20'S super quiet.   settled with the stock fans and ran at 6% speed undeclocked

Thats unfortunate. Was there no gain or its just that it wasn't worth the price of 2 FHP-141?

[valkir]

The problem with the FHP-141 is that you will also need a external system to power them since the sp20 fan is using a special connector.

You will also need to find a way to make the airflow correct into the sp20. This is a lot of work but you could try.

[philipma1957]

I did a fan mod for 1 sp20.

I pulled the fan out completely and added a silverstone to the external end of the miner.

Are you sticking with a Pull configuration? Have you tried switching to Push, or Push+Pull?

pull and while it is quiet it is not quite correct. 

 next will be push- pull

Did you ever try this? I can find a follow up to this with the search function.

I would quite like to know how low you can drop the dB with 2 silverstone FHP-141.

GAVE UP ON GETTING SP20'S super quiet.   settled with the stock fans and ran at 6% speed undeclocked

Thats unfortunate. Was there no gain or its just that it wasn't worth the price of 2 FHP-141?

if you did not mind an underclock to around 1000gh it ran too hot at 1200gh.  as for control I used external psu and got it very quiet .  I also kept both silverstones external and fully pulled the internal fan

[dmwardjr]

The problem with the FHP-141 is that you will also need a external system to power them since the sp20 fan is using a special connector.

You will also need to find a way to make the airflow correct into the sp20. This is a lot of work but you could try.

This is the "special connector" used by the SP20.

http://www.ebay.com/itm/161350482183?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

[VirosaGITS]

I did a fan mod for 1 sp20.

I pulled the fan out completely and added a silverstone to the external end of the miner.

Are you sticking with a Pull configuration? Have you tried switching to Push, or Push+Pull?

pull and while it is quiet it is not quite correct. 

 next will be push- pull

Did you ever try this? I can find a follow up to this with the search function.

I would quite like to know how low you can drop the dB with 2 silverstone FHP-141.

GAVE UP ON GETTING SP20'S super quiet.   settled with the stock fans and ran at 6% speed undeclocked

Thats unfortunate. Was there no gain or its just that it wasn't worth the price of 2 FHP-141?

if you did not mind an underclock to around 1000gh it ran too hot at 1200gh.  as for control I used external psu and got it very quiet .  I also kept both silverstones external and fully pulled the internal fan

Thank you for the details. I might stick to S5's in that price range.

Having an underclocked S20 could be of interest but its a bit expensive compared to getting S3's and maybe even S5 or such.

[therusso81]

Yes . USE welding .. What number it is that regular . to buy and replace .

    help me

[nhminer]

Has anyone used the DS1200 power supply that the SP30s use on an SP20?

I have the 12V wired up, but am looking for the correct jumpering to turn on the supply

Thanks,

~nh

[Sweminer777]

i can't seem to get my miner above 1.1 thz.

Asics showing 125c all the time, what should i do ? i have repasted it recently might have done a bad job ? .

Temps are around 38c / 69 c.